Destin, FL rainwater: 43,992 gallons off a roof
Destin, FL: gallons off the roof each year
43,992gallons a year
That is a 1,500 sq ft asphalt roof under Destin, FL's normal 55.4 inches of rain, about 795 gallons for every inch that falls.
In Destin, FL a single barrel does most of the work. Storms come often enough that a small tank refills before it runs dry, and a bigger one would mostly sit full.
Rainfall: NOAA 1991-2020 climate normals, the Destin Ft Walton Ap station (0.3 mi away). Destin, FL ranks 94th wettest of the 173 cities covered in Florida.
Month by month in Destin
| Month | Rain (in) | Off the roof (gal) | Garden shortfall (gal) |
|---|---|---|---|
| Jan | 4.52 | 3,593 | |
| Feb | 4.96 | 3,942 | |
| Mar | 4.70 | 3,736 | |
| Apr | 4.55 | 3,616 | |
| May | 3.22 | 2,559 | 141 |
| Jun | 4.70 | 3,736 | |
| Jul | 5.77 | 4,586 | |
| Aug | 6.08 | 4,832 | |
| Sep | 5.18 | 4,117 | |
| Oct | 2.82 | 2,241 | 191 |
| Nov | 4.13 | 3,283 | |
| Dec | 4.72 | 3,751 |
Aug is the wettest month (6.08 in, 4,832 gal off the roof); Oct the driest (2.82 in). Garden shortfall is what a 200 sq ft vegetable bed needs beyond the rain that lands on it, April to October.
What size rain barrel for Destin
Best fit: one 55-gallon barrel, which delivers about 289 gallons to the garden in a normal year (87.1% of its need).
Before you buy, a 55-gallon barrel with a downspout diverter is the whole job. Check that the overflow points away from your foundation, because most of Destin's roof water will pass straight through it.
| Tank | Water used (gal/yr) | Spills over (gal/yr) |
|---|---|---|
| 55 gal | 289 | 42,729 |
| 110 gal | 289 | 42,729 |
| 165 gal | 289 | 42,729 |
| 275 gal | 289 | 42,729 |
| 550 gal | 289 | 42,729 |
| 1,000 gal | 289 | 42,729 |
| 1,500 gal | 289 | 42,729 |
| 2,500 gal | 289 | 42,729 |
| 5,000 gal | 289 | 42,729 |
Simulated storm by storm through a normal year using the station's count of days with 0.1 in or more of rain each month.
Is rainwater collection legal in Florida?
Legal. Florida approves onsite non-potable use of rainwater for landscape irrigation, vehicle washing, filling pools and fountains and, in some local jurisdictions, toilet/urinal flushing (Florida Plumbing Code). No state storage cap or registration for non-potable collection.
Checked against the current source on 2026-11-06. Source